Coil-forming apparatus.



M. SANDFIELD.

con FORMING APPARATUS.

APPLICATION FiL ED FEB- l, 1912. w

Patented bept. H, 1915.

3 SHEETSSHEET I.

IV]. SANDFJELD.

COIL FORMING APPARATUS.

a APPUCATION FILED FEB. I, 1912. L153fi4 PatentedSept. 14, 1915.

3 SHEETS-SHEET 2.

INVENTOB M. SANDFIELD.

COIL FORMING APPARATUS.

APPLICATION 'HLED FEB-1. i912.

LwSEMu Patented em. 14, 1915.

3 SHEETSSHEET 3.

INVENTOR ?;%1 M

/BY QfmlayKmwp/ A I TU R N EY i ran o m ."iVIICHAEL SANDFIELD, 0F WILKINSBURG, PENNSYLVANIA, ASSIGNOR TO TESTING-- HOUSE ELECTRIC AND MANUFACTURING COMPANY, A CORPORATION OF PENN- SYLVANIA.

coin-romaine APPARATUS.

Specification of Letters Patent. Patn1bgd t 1% 1915, 7

Application filed February 1, 1912. Serial No. 674 805.

To all whom it may concern:

Be it known that 1, MICHAEL SANDFIELD, a citizen of the United States, and a resident of VVilkinsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Coil-Forming Apparatus, of which the fol number of successive duplicate'coil blanks with the certainty of producing finished coils of exactly the same form and dimensions.

In my co-pending application, Serial No. 598,520, filed December 21, 1910, assigned to the Westinghouse Electric and Manufacturing Company and patented Sept. 10, 1912. as No. 1,037,998, I have shown and described a coil-forming machine of the same general character as that constituting the subjectmatter of my present invention, the latter embodying novel features and being equipped with additional mechanism which coiiperates with the other parts of the apparatus to produce a skewed coil instead of a. symmetrical coil of the diamond type.

Figure 1 of the accompanying drawings is a front elevation of a coil-forming machine constructed in accordance with my invention and showing a coil blankin position. Fig. 2 is a side elevation of the apparatus shown in Fig. 1, the movable member of the apparatus being shown in open position and the coil in a form adapted for use. Fig. 3 is a plan view of a completed coil. Figs. 4, 5 and 6 are, respectively, a sectional view.v a plan view and an end elevation, on a larger scale, of the'coil-forln- -ing mechanism which is mounted on the movable'member of the apparatus shown in Figs. 1 and 2 and comprises relatively adjustable parts for the purpose of offsetting one side of the coil relative to the other side, as hereinafter more fully pointed out,

The frame upon which the operating mechanism of the apparatus is mounted is end of the channel plate 3, and a horizontal shaft 8, having a. longitudinal groove 9 in its upper side. extends through and is rigidly secured to the projections 7 10. having a longitudinal slot 11 in its upper portion and a transverse slot 12- at its extreme upper end, to provide a handle, has two curved portions 13 and 1 .1 below the longitudinal. slot 11, and its lower end is provided with a weight 15. Between the two curved portions 13 and 14c, the lever is provided with a bearing to receive the shaft 8, so that a rotative movement of the lever relative to the shaft is permitted.

- Each end of the shaft 8 is provided with an adjustable block 16 loosely mounted on a sleeve or bushing 16 having a spline 17, which fits into the groove 9 in the shaft The sleeve is readily movable longitudinally of the shaft except when the spline is pressed into the groove by means of a curved rod 18, the horizontal portion of which serves as a handle and the vertical portion of which may be screwed into,the sleeve, so that its inner end will bear against the spline. The block 16 is free to rotate about the sleeve 16, but its position is otherwise determined by the sleeve. Mounted upon the block 16, is a. U-shaped frame 19 having slots 20 to receive a bolt 21 to-which the block is connected by a link 21 and an eccentric QZ the frame being'v'ertically adjustable to the limit of the length of the slots and being clamped in any position to which it may be adjusted. by means of the bolt PI and its nut. The head of the bolt 21 -is provided with a bent rod projection 23* A lever tween the arms'of the U-shaped portions.

The arrangement of the rods 23 and "2% is such that a clamp- 63 is maintained horizon- 'tal, thereby avoiding friction between the parts and the coil-ends during the forming process; This is particularly important, since the insulation on the coil would otherwise be injured.

. off the clampbeing hinged to-the' lower edge .of the .(iaStiIigandhavinga seat 34 which is.

The casting 6 is provided with a sector 25; having a graduated scale and with teeth corresponding to the' scale graduations, which are intended to indicate'the angular movement of the lever 10 relative to the channel plate 3.

it may be adjusted to any desired position" on the sectorand securely locked in that "position with its upper face coinciding with any one of the scale graduations. The

curved portion 13 of the lever 10 is pro vided with a portion 29.whi ch embraces the sector 25 and is adapted to engage the stop block 27 and thus limit its degree of movement to such extent as may be desired. A

latch 29* is pivotally secured to the portion 29 and is adapted to engage the lower edge of the stop block 27, thereby locking the lever in position after the v coil blank is spread.

A casting. 30 is mounted upon the channel plate 3 and is so clamped in position thereon, by means of a bolt 31 and slot at, as .to' be adjustable vertically in accordance with the radius of the core member for which the coil to be bent is intended, the degree of adjustment being determined by means of the graduated scale 5. The casting 30 constitutes one member of a clamp and isprovided'witlra seat 32 for one side of the coil to be bent, the other member 33 the counterpart of. the seat 32 in the casting.

The hingedmernber 33 of the clamp is'con-.

nected'to an eccentric 35, by means of a :linkBGfand-the eccentric is turned, to open and close the lever 37.

7 Referring specially toFigs', 4, 5and 6, a

clamp, by meansof a rod or casting 38, which corresponds to the casting 30, is mounted on a carriage 39 having strips or' guide rails 40 and 41 betWeen'v' hich' a portion 42fof the casting 38 projects and on Which the casting may be adjusted trans Mounted upon the sector is a stopblock 27 having a clamping screw 28, so that 111 eted bending operation. (See Fig. 2.).

to a casting 45 by means -of a pin 47, the

casting being mounted upon the lever 10 and being clamped thereto by means of a bolt 46. The adjustment of the carriage 39 about the pin 47 is limited to a very small angle by a bolt 48 which extends through a curved slot $9 in a projection 50- otthecasting 45 and which is secured, at its ends, to lugs 51 with which tlie carriage 39 is provided. Anad-justing-screw 52 is rotatively mounted in side members 53 of the carriage 39. Y A nut 54: is mounted 'on the adjusting screw 52 between the side members 53 and is provided with prpj'ection 55 which extends into the casting 38, the arrangement of parts being such that the rotation of the screw 52 produces an adjustment of the casting 38 on thecarriage 39 transversely of the lever 10.

member 58 is hinged to the upper edge of: 'the-cast1ng, its lower edge being provided with a seat 59 which is the counterpart of that in the casting. The hinged clamp member is connected to an eccentric (30 by means of a link Gljand. the eccentric is turned toopen and close the clamp by means of a rod or lever 62, this clamping structure being substantially like that which is mounted on the channel plate.

Each pair oi? rods '23 and 2 1- is provided with a clamp 63 for one end oi? the coil blank, this clamp comprisin a block 4 having slots 55 and bearing pieces 3 thcr in for the rods 23:5 and 24- which are so dis posed as to permit freedom of relative movement between the rods and the block. clamped to theinner end of the block are two platcs 67 having front edgcs'ot' such form'as to receive the coil ends and, in a measure, to determincthe form which such ends shall take. when the bending is com A rod 68 of a 'iproximatcly L-shapc has its longer arm projecting through a hole in'the plates (37- and the end of the block (34; and is pro videdwith nuts .to prevent its ac- .sides ofthe coil blank so as to hold the coil' blank in position while it isliinle'i' 'oiiig' the The two setsofi'oclsandthe coepera ting clamps are similar and, consequently,adeskiription of one will sufiice for both.

' In using the apparatus to bend a coil into 'cidental withdrawal; and its shorter arm final form, the sides of the coil blank having the form indicated in Fig. 1 are clamped in the seats means 'of the eccentrics and 60 and the levers 37 and 62. The end clamps 63 are brought into position, the frames 19 being first either loweredinto'the position of Fig. 1 by turning the handle levers 23, or raised into its opposite position according as the coil is to be used on the stator or the rotor of a dynamo-electric machine, with the ends of the coil blank projecting into the spaces between the plates 67, and then the lL-shaped rods 68 are inserted. The handle of the lever 10 is grasped by the operator and is drawn away from the frame until its part 29 engages the stop 27 which has been set in accordance with the desired width of the coil. The frames 19 are either raised-or lowered from their original setting by turning the handle levers 23 according as the coil is to be used on the stator or the rotor of a dynamo-electric machine. This operation shapes the coil for'fitting into slots formed either on the stator or rotor, as required. When the frames 19 are in the raised position, the parts of my machine at the-end of the complete operation, are positioned as indicated in Fig. 2. At this stage of the bending process, the coil is a regular diamond shape, the two side portions which are adapted to enter the core slots of the dynamo-electric machine being directly opposite each other. In order to produce the skewed diamond shape as shown in Fig. 3 of the drawings, the adjusting screw 52 is so rotated as to move the coil clamp comprising the parts .38 and 58 on the guide rails 40 and 41 and to force the side of the coil, which is gripped in this clamp to one side,

' making it odset relative to the side which is held in the clamp comprising parts 32 and 34; The L-sh-aped rods 68 may now be removed and the coil be released from the clamps, when it may be readily removed and the parts returned to the original position for the insertion of another coil blank. The operation may be repeated any desired number of times with the certainty that the resulting coils will be alike in form and dimensions, provided the original blanks are alike.

The adjustment features provided and 5 hereinbefore described, are obviously such as to permit adaptation of the apparatus to coils of various sizes which are intended for use with either stationary or rotatable core members of various diameters, the blocks 16 being adjusted upon the shaft 8 to such positions that, when. the lever 10 is in its outermost position and the coil is bent to its final form, the rods 23 and- 24 will be substantially at right angles to the shaft 8.

The end clamps, 63 are adjusted upon the rods 23 and'24 to such position that the coil 32 and 34, and 57 and 5 by if the coils are intended for insertion in the slots formed in the convex cylindrical surface of a core member, such as a rotor, the clamps will be so adjusted that the coil ends will be pulled inwardly toward the center of the shaft 8. By this means, the ends of the coil are properly offset in every case to clear the opposed member when they are assembled in a dynamo-electric machine.

' While the apparatus here shown and described has been found to be well adapted for the service intended, it will be understood that variations of structural details and arrangements of parts may be made without departing from the spirit and scope of my invention.

l. claim as my invention:

1. A coil former comprising relatively movable hinge-connected members, side clamps adjustably, secured to the respective members, pivotally mounted end clamps which are independently adjustable relative to the hinge-connected members, and means for adjusting one of said side clampstra-nsversely of the member to which it is secured.

2. A coil former comprising a vertical plate or frame, a lever pivotally connected thereto, side clamps one of which is supported on the plate or frame and the other of Which-is both longitudinally and transversely adjustable relative to the lever, and

end clamps independently adjustable relative to the hinge-connected members.

3. A coil former comprising a vertical plate or frame, a casting or bracket secured thereto, a lever pivotally secured to the casting or bracket, side clamp members adjustably secured to the plate or frame and to the lever, opposing end clamps pivotally and adjustably supported at the pivotal axis of the lever, and means for adjusting one of the side clamps transversely of the member on which it is mounted.

4. A coil former comprising relatively movable hinge-connected members, a side clamp adjustably secured to one of the members, a carriage adjustably secured to the other member, a second side clamp mounted on the carriage and transversely adjustable thereon relative to the member on which it is mounted.

5. A coil former comprising relatively movable hinge-connected members, a side clamp adjustably secured to one of the memits hers, a carriage block, adjustably secured. to the other member, a second side clamp mounted on the Carriage and transversely adjustable thereon relative to the member on Whichit is mounted and end clamps independently adjustable relative to the hingeeonnected members.

member, a second clamp mounted on the carnage and transversely ad ustable thereon relative to the member on which it is,

mounted.

In testnnony whereof, I have hereunto subscrlbed my name tlns 1b d-lry of January,

MICHAEL SANDFIELD. Witnesses M. C. MERZ, B. B. Hmns. 

